title: A novel pyrimidine derivative as a fluorescent chemosensor for highly selective detection of aluminum (III) in aqueous media.
abstract: An efficient fluorescent chemosensor Al(3+) receptor based on pyrimidine derivative,2-amino-6-hydroxy-4-(4-N,N-dimethylaminophenyl)-pyrimidine-5-carbonitrile (DMAB), has been synthesized by three-component condensation of aromatic aldehyde, ethyl cyanoacetate and guanidine hydrochloride in ethanol under alkaline medium. High selectivity and sensitivity of DMAB towards Aluminum ion (Al(3+)) in water: ethanol and acetate buffer at pH 4.0 makes it suitable to detect Al(3+) with steady-state UV-vis and fluorescence spectroscopy. Method shows good selectivity towards Al(3+) over other coexisting metal ions tested, viz. Fe(2+), Ni(2+), Cu(2+), Co(2+), Pb(2+), Sb(3+), Na(+), Ca(2+), Mg(2+), Zn(2+), Hg(2+), Ba(2+), Cd(2+) and K(+). A good linearity between the Stern-Volmer plots of F0/F versus concentration of Al(3+) was observed over the range from 10 to 60 μg mL(-1) with correlation coefficient of 0.991. The accuracy and reliability of the method were further confirmed by recovery studies via standard addition method with percent recoveries in the range of 101.03-103.44% and lowest detection limit (LOD=7.35 μg mL(-1)) for Al(3+) was established. This method may offer a new cost-effective, rapid, and simple key to the inspection of Al(3+) ions in water samples in the presence of a complex matrix and can be capable of evaluating the exceeding standard of Al(3+) in environmental water samples. The probable mechanism for fluorescence quenching was also discussed.
authors.affiliation: Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India.
authors.forename: Vishwas D
authors.initials: VD
authors.lastname: Suryawanshi
authors.forename: Anil H
authors.initials: AH
authors.lastname: Gore
authors.forename: Pravin R
authors.initials: PR
authors.lastname: Dongare
authors.forename: Prashant V
authors.initials: PV
authors.lastname: Anbhule
authors.forename: Shivajirao R
authors.initials: SR
authors.lastname: Patil
authors.forename: Govind B
authors.initials: GB
authors.lastname: Kolekar
mesh_terms: D000535:Aluminum / Q000032:analysis*; D002412:Cations / Q000032:analysis; D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D011743:Pyrimidines / Q000737:chemistry*; D015203:Reproducibility of Results; D013050:Spectrometry, Fluorescence / Q000379:methods; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D014867:Water / Q000737:chemistry
chemical_list: D002412:Cations; D005456:Fluorescent Dyes; D011743:Pyrimidines; D014867:Water; D000535:Aluminum
keywords: Al(3+) ion; Aqueous media; Environmental analysis; Fluorescence quenching; Pyrimidine derivative